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During the time period 600 BCE to 600 CE, the external factors that caused imperial decline were the spread of diseases and invasion by pastoral nomadic people. However, some factors were internal such as the gap between the rich and the poor. DONE

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During the Classical Era (600 BCE to 600 CE), some of the external factors that caused imperial decline and collapse were invasions of pastoral-nomadic peoples and the spread of infectious disease throught densly populated empires and trade routes. However, there were also internal causes, like division between the upper and lower classes, that contributed to the fall of these early empires. done :)

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During the period 600 BCE to 600 CE, the external factors that caused imperial decline and collapse were invasion by nomadic groups and the spread of diseases through trade. However, there were also internal factors such as the growing gap between rich and poor that caused decline and collapse. DONE

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In between 600 BCE and 600 CE, external factors that caused imperial decline and collapse in the Empires of the time were in the invasions of pastoral-nomadic peoples and the lack of trade , but these could only affect the Empires and they needed a way in, which slave and lower class revolts caused the weakening of the empires. DONE

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During the period circa 600 BCE to 600 CE, the external factors that caused imperial decline were due to outside invasions and epidemic diseases. However, there were some internal causes such as the growing gap between the rich and poor, which also had a great effect on the imperial collapse. Done

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During the period circa 600 BCE to 600 CE, the external factors that caused imperial decline were due to outside invasions and epidemic diseases. However, there were some internal causes such as the growing gap between the rich and poor, which also had a great effect on the imperial collapse. Done

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During the period 600 BCE to 600 CE, there were many external factors that lead to imperial decline and collapse. Many having to do with invasions from outside forces and disease which would ultimately weaken and destroy an empire. But along with external causes, there was also a number of internal causes that played a part in imperial decline and collapse. Done

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During the Time period 600 BCE to 600 CE the external factors that cause imperial decline and collapse were the invasions of Pastoral Nomadic people and the spread of disease. However, Empires where also weekend internally by internal factors such as revolts and  a disconnect between the capital and the rest of the land.
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During the Classical Era from 600 BCE to 600 CE, factors such as invasions from groups of pastoral nomads, the spread of disease between societies, and the decline of trade had a profound negative effect on the life of an empire and would ultimately lead to their collapse.

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Imperial decline and collapse in the period circa 600 BCE to 600 CE (classical era) were caused by external factors such as invasion by various indigenous pastoral nomadic groups in Eurasia, and disease spread by new technology that increased trading within early empires , however not all imperial decline was caused by external factors. In fact, internal factors such as deforestation, erosion/irrigation, and conflicts between empires caused imperial decline and collapse as well.

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During the period 600 BCE to 600 CE, the external factors that caused imperial decline and collapse were invasions by pastoral nomadic peoples and the spread of pathogens. However, without other internal causes, like uprisings and revolts, the decline and collapse wouldn't have been as significant.
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During the period circa 600 BCE to 600 CE the extent to which the external factors caused imperial decline and collapse were external invasions of different groups of people and pathogens such as plagues that came from contact with other groups of people. However some empires mostly collapsed from internal reasons such as separations in social classes. Done.

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During the period 600 BCE to 600 CE, the external factors that caused the collapsing of empires were invasions by pastoral nomadic peoples and diseases. However, internal factors play big roles in collapsing as well. Done

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During the period 600 BCE to 600 CE, the major external factors that caused imperial decline and collapse were invasions of pastoral nomadic peoples and spread of diseases due to trade. However, many more internal factors, such as unstable government and the exploitation of resources, played a significant role as well.

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During 600 BCE and 600 CE, the external factors that caused imperial decline and collapse were invasions from nomadic people and diseases. However, it can be argued that a cause for imperial collapse was lack of resources.
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During the time period of 600 BCE to 600 CE the external factors that caused imperial decline were invasion by Pastoral Nomadic Peoples and  the spread of disease. However not all the factors that caused imperial decline were external some such as, revolts, the growing gap between rich and the poor, as well as simple overextension of the empire themselves, were internal factors. 

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During the time period of 600 BCE to 600 CE the external factors that caused imperial decline were invasion by Pastoral Nomadic Peoples and  the spread of disease. However not all the factors that caused imperial decline were external some such as, revolts, the growing gap between rich and the poor, as well as simple overextension of the empire themselves, were internal factors. 

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During the period circa 600 BCE to 600 CE, the key causes that caused imperial decline and collapse were Nomadic raiders attacking the borders and epidemics which plagued the empires. However these factors alone did not cause the decline and collapse of empires, they were sped along by internal factors such as economic instability, political instability, and revolts which all made empires susceptible to external factors. DONE

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During the time period 600 BCE to 600 CE, the major external factors that lead to imperial decline were widespread epidemics as a result of trade and trans-regional interaction, and invasions by pastoral nomadic societies. However, there existed internal factors such as revolts and rebellions due to growing economic and class disparities within empires that left them vulnerable to the previously mentioned external factors.

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During the period circa 600 BCE to 600 CE, the external factors that caused imperial decline and collapse were invasions by pastoral nomadic groups, and diseases spread from other areas through the increase in trade. However there were some internal factors as well, such as the growing gap between the rich and poor, and the wealthy people's monopoly on fertile land.
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During the period 600 BCE to 600 CE, the external factors that caused imperial decline and collapse were nomadic invasion and the spread of diseases. However internal factors also caused imperial collapse.
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During the time period 600 BCE to 600 CE, the external factors that caused imperial decline and collapse were attacks from pastoral-nomadic societies in the surrounding areas and spread of diseases through trade networks. However the increased gap between rich and poor led to revolts that weakened the empire making them susceptible to other factors such as outside attacks. Done.

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During the 600 BCE to 600 CE,the external factors that caused imperial decline were by invasion of pastoral nomadic peoples and the spread of diseases through trade,however these factors were not the only factors for the fall of those empires there were many internal problem.One is revolutions,for example in china during the han dynasty there was a big gap between the rich class and the poor class and the rich were taking most of the land,in witch the poor revolted.Another cause would be over exploitation of land.In wester pencil they had competally ran out of trees in witch decreased trade and ability to build more things.Done

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During 600 BCE to 600 CE the external factors that cuased imperial decline were invasion from pastoral nomadic peoples and the spread of disease from the use of trade. However not all cuases were external, some empires suffered from the seperation of lower and upper classes, resulting in many uprisings weakening the empire. DONE

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During the period 600 BCE to 600 CE, the external factors that caused imperial decline and collapse were the invasion of pastoral nomadic people and the spread of diseases from surrounding areas. However there were also internal factors that contributed to this as well, such as political instability due to a change in rulers quite frequently and revolts that took place because of the large gap between the rich and the poor. Done

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During the classical era, external factors led to imperial decline and the eventual fall of empires. These factors include the spread of disease and invasions from pastoral nomadic people. However, the external factors were made more prominent by empires already being weakened by internal factors such as growing class divisions. Done

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From 600 BCE to 600 CE, the external factors that caused imperial decline were outside invasions by pastoral nomadic people and epidemic diseases that were often spread through long-distance trading. However external factors were not the only factors that would cause the downfall of an empire. One internal factor would be uprising between social classes.
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During the period circa 600 BCE to 600 CE, the external factors that caused imperial decline and collapse were looming invasions of pastoral nomadic people and plagues and other diseases being moved in with trade. However, external factors were not the only factor causing the imperial collapse. Others include a growing gap between the rich and the poor.
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During the period 600 BCE to 600 CE some external factors that caused imperial decline and collapse were the spread of disease along trade routes, and invasions by pastoral nomadic peoples. However, internal factors such as growing political unrest and class polarization also played a major role in the decline and collapse of classical empires. External and internal factors both played major roles in the decline and collapse of empires during this time period.
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During the period circa 600 BCE to 600 CE, the external factors that caused imperial decline and collapse were nomadic invasions and diseases. However, internal factors like political instability may have had a greater effect

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From 600 BCE to 600 CE, external factors that contributed to imperial decline included invasions by pastoral nomadic tribes and disease spread along trade networks. However, internal factors such as political instability and a growing gap between the rich and the poor also had a huge effect. As such, empires often fell to uprisings and internal distress as much as they did to outside forces.
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During the period 600 BCE to 600 CE, the external factors that caused imperial decline and collapse were the spread of pathogens through trade and the invasion of pastoral nomadic people. However if not for the internal conflict between the rich and poor class citizens then the empires most likely would not have been weak enough to succumb to those factors. DONE

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During the period between 600 BCE and 600 CE, the external factors that caused imperial decline were outside invasions by pastoral nomadic groups, and diseases spread through the dense trade networks that these empires had established. However, many of these declines would not have happened if not for other internal problems in these empires that weakened governments as well, such as revolts and political instability.

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During the 600BCE to 600CE time period, the external factors that caused imperial decline were the nomadic invasions from tribes like the Xiongnu and the spread of diseases like the plague in Europe. However, internal factors like revolts because of a gap between the rich and poor also contributed to the fall of empires.
DONE